When a small amount of hydrochloric acid (HCl) is added to a solution of Na2HPO4, the pH of the

solution does not change markedly. The pH also does not change drastically when a small amount of
sodium hydroxide (NaOH) is added to this same solution. Based on these observations, the compound
Na2HPO4 is:
a. able to donate hydrogen atoms to HCl.
b. able to remove hydrogen ions from the OH? of NaOH.
c. acting as a buffer.
d. an enzyme facilitating the reaction between HCl and NaOH.
e. acting as a solvent.


C

Biology & Microbiology

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